Coastal erosion is an important but also a difficult problem to tackle. The complexity lies in the need to incorporate non-market value, e.g. of a beach, and the need to implement the optimal strategy for each adaptation measure and the need to incorporate intangible effects. We provide a framework to quantify the net present value (NPV) of different adaptation strategies to alleviate the impacts of coastal erosion caused by sea level rise in a local area. We consider three adaptation measures: retreat, beach nourishment and sea wall. For each measure, we find the optimal implementation of the measure so as to maximize the benefits generated from the beach and the rent of land and housing stocks, net of the cost required by the measure and the loss of land and structures that are eroded. A multi-criteria method is applied at the end to incorporate social values into the cost benefit analysis framework.